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72 lines
1.7 KiB
72 lines
1.7 KiB
/*** getopt.c
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*
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* This function is the public domain version of getopt, the command
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* line argument processor, and hence is NOT copyrighted by Microsoft,
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* IBM, or AT&T.
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*/
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#include <io.h>
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#include <string.h>
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#define EOF (-1)
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#define ERR(s, c) if(opterr){\
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char errbuf[2];\
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errbuf[0] = c; errbuf[1] = '\n';\
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(void) _write(2, argv[0], (unsigned)strlen(argv[0]));\
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(void) _write(2, s, (unsigned)strlen(s));\
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(void) _write(2, errbuf, 2);}
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int opterr = 1;
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int optind = 1;
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int optopt;
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char *optarg;
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int getopt(int, char **, char *);
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int
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getopt(
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int argc,
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char **argv,
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char *opts)
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{
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static int sp = 1;
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register int c;
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register char *cp;
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optarg = NULL;
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if(sp == 1)
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if(optind >= argc ||
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(argv[optind][0] != '/' && argv[optind][0] != '-') ||
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argv[optind][1] == '\0')
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return(EOF);
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else if(strcmp(argv[optind], "--") == (int) NULL) {
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optind++;
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return(EOF);
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}
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optopt = c = argv[optind][sp++];
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if (c == '\0') {
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optind++;
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sp = 1;
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return(getopt(argc,argv,opts));
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}
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cp=strchr(opts, c);
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if(c == ':' || (cp == NULL)) {
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ERR(": illegal option -> ", (char) c);
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if(argv[optind][++sp] == '\0') {
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optind++;
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sp = 1;
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}
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return('?');
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}
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if(*++cp == ':') {
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if ((optind+1) < argc) {
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optarg = argv[optind+1];
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}
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if (argv[optind][sp] == '\0') {
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sp = 1;
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if (++optind <argc)
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optind++; /* skip over parm-arg */
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}
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}
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return(c);
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}
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